Error BCE0018

Ok if you were to go to my other question error BCE0019 ,(http://answers.unity3d.com/questions/1082700/error-bce0019-4.html) , i was able to get that fixed, but now i got a new error.

Error: Assets/Animations/Part 3 - Animations_Arms/PlayerGUI.js(13,24): BCE0018: The name 'staminaBarDisplay' does not denote a valid type ('not found'). Did you mean 'System.Security.Policy.SiteMembershipCondition'?

Code:

 #pragma strict
  
  private var hasAxe : boolean = false;
  
  private var canSwing : boolean = true;
  private var isSwinging : boolean = false;
  var swingTimer : float = 0.7;
  
  private var controller : CharacterController;
  private var playerGUI : PlayerGUI;
  
  function Start()
  {
      hasAxe = true;
      controller = GameObject.Find("First Person Controller").GetComponent(CharacterController);
      playerGUI = GameObject.Find("First Person Controller").GetComponent(PlayerGUI);
  }
  
  function Update()
  {
      //If we aren't moving and if we aren't swinging, then we idle!
      
      if(controller.velocity.magnitude <= 0 && isSwinging == false)
      {
          GetComponent.<Animation>().Play("Idle");
          GetComponent.<Animation>()["Idle"].wrapMode = WrapMode.Loop;
          GetComponent.<Animation>()["Idle"].speed = 0.2;
      }
      
      //If we're holding shift and moving, then sprint!
      
      if(controller.velocity.magnitude > 0 && Input.GetKey(KeyCode.LeftShift))
      {
          GetComponent.<Animation>().Play("Sprint");
          GetComponent.<Animation>()["Sprint"].wrapMode = WrapMode.Loop;
      }
      
      //WOODCUTTING SECTION
      if(hasAxe == true && canSwing == true)
      {
          if(Input.GetMouseButtonDown(0))
          {
              //Stamina reduction applied to the PlayerGUI script
              playerGUI.staminaBarDisplay -= 0.1;
              
              //Swinging animation
              GetComponent.<Animation>().Play("Swing");
              GetComponent.<Animation>()["Swing"].speed = 2;
              isSwinging = true;
              canSwing = false;
          }
      }
      
      if(canSwing == false)
      {
          swingTimer -= Time.deltaTime;
      }
      
      if(swingTimer <= 0)
      {
          swingTimer = 1;
          canSwing = true;
          isSwinging = false;
      }
  }

What is wrong?